ROLAND SYSTEM 100 104

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APR. 20 1977 SYSTEM'IOO-IO4

CONTENTS
1. SPECIFICATIONS ........................................................... 2
2. DISASSEMBLY and PARTS LOCATION ......................................... 3
3. CIRCUIT DESCRIPTION ..................................................... 4
4. GENERAL BLOCK DIAGRAM ................................................ 5
5. GENERAL CIRCUIT DIAGRAM .............................................. 7
6. PCB ASSEMBLY and CIRCUIT DIAGRAM ...................................... 8~9
6-1 SEQUENCE BOARD (OP~31) ............................................. 10
6-2 REGISTER BOARD (OP-32,0P-33) ........................................ 11
6-3 OUTPUT RANGE and CHANNEL SELECT BOARD (OP-34) .................... 12
6-4 POWER SUPPLY BOARD (PS»25,PS-26) .................................... 13
7. ADJUSTING PROCEDURES .................................................. 14
. PARTS LIST ............................................................... 15
9. PARTS PICTORIAL ......................................................... 17

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SYSTEM lOO-IO4 APR. 20 1977
SPECIFICATIONS
MODEL-104

2-channel, 12-step SEQUENCER (Series out: 24 steps)

1. CLOCK OSCILLATOR

Clock Rate : 0.1 - 10Hz (X1)
1H2 - 100Hz (X10)
Range : X1 or X10
Control : CLOCK RATE, GATE TIME
Gate Time : 10% - 90%

Gate Time Indicator: on/off LED

2. END STEP SELECTION

Step Number : 1 -12 steps
Channel Selector : CH-A or CH-B
Sequence Selector : One Time or Repeat

3. CONTROL SELECTION

START : Reset-Start Ext. Trig ........... +5V threshold level
CONTINUE : Continue-Start Ext. Trig ........... +5V threshold level
STOP : stop End Pulse Out ...... +14V Pulse

STEP : step Ext. Trig ........... +5V threshold level

4. VOLTAGE REGISTER SECTION

VOLTAGE REGISTERS: CH-A, CH-B: 12-steps each
Range : 2.5V - 5V - 10V

5. OUTPUT SECTION

Gate Outputs : X2 .......... +14V
Series Outputs : X2
Parallel Outputs : CH-A X2

CH-B X2

6. DIMENSIONS AND WEIGHT
Overall Size : 280mm (11) wide, 355mm (14") deep, 145mm (5%) high,
Net Weight : 5kg (11 lbs.)

7. POWER REQUIREMENTS

100-120V 50-60Hz .

220~250v 50-60Hz' 5W max'